Machine for transferring differential motion.



N0. 628,094. V Patented .IlIIy 4, I899;

D. H B. HOOPER. v MACHINE FOR TRANSFERRING DIFFERENTIAL IIIOTII'JNv(Application filed Mar. 15, 1899.)

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UNITED STATES PATENT OFFICE.

DANIEL H. B. HOOPER, OF BIDDEFORD, MAINE.

MACHINE FOR TRANSFERRING DIFFERENTIAL MOTION.

sPncIFIcA'rIon forming part of we. Patent No. 628,094, dated July 4,1899. Application filed March 15,1899. Serial No- 709,220. (No model.)

scription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in machines for transferringdifferential motion and it consists in a novel arrangement of thedriving-plates, driven and driving gear, and in certain other details ofconstruction, that will hereinafter be set forth and described.

The idea of the machine is to provide a simple and effective means fortransmittinga differential rotary motion from one shaft to another, bothshafts being in the same plane. In the device as shownin the drawingsmotion is transmitted at a ratio of seven to eight. As-

shown in the drawings, the gears are provided with thirty-five or fortyteeth, respectively, so that a slower motion is imparted to the drivenshaft in the ratio of seven to eight. In other words, when thedriving-gear has made one revolution the driven gear still has oneeighthof a revolution to make in order to complete its whole revolution on orwith its shaft. Any desired ratio of revolutions between the driving anddriven shaft can be attained by simply changing the number of teeth ineach gear, respectively; but I do not wish to limit myself to the exactratio of revolutions, simply showing this ratio as a convenient way ofillustrating my device.

My invention is especially designed to be attached to card-grindingmachines where a different speed is required to revolve the shell of thegrinder and the screw which causes the emery-wheel to travel back andforth. In card-grinding devices as previously constructed it has beencustomary and necessary to ob tain the requisite differentialrevolutions between the shell and the screw by means ofpulleysindependently and differently mounted. This has not always beensatisfactory and has caused much delay and laborin properly setting upthe machine.

In the drawings herewith accompanying and forming a part of thisapplication, Figure 1 is a horizontal sectional view of my device. Fig.2 is a vertical section taken on line X X of Fig. 1 looking in thedirection of arrow 1. Fig. 3 is a vertical section taken on lines XX ofFig. 1 looking in the direction of arrow 2. Fig. 4 is an elevationshowing the the driven cylinder to the driven shaft.

Same letters refer to like parts.

In said drawings, A represents the cylinder or outer shell of acard-grinding machine. This maybe driven in any suitable manner, as bymeans of a pulley B, running over a shaft 0, which is made integral withthe shell A. Attached to the shell A in any suitable manner, as by meansof bolts orscrews E, is an annular shaft F. Mounted on the extremity ofsaid shaft and rigidly held in place by means of spring-clamp G or someother suitable means' is a disk or driver H, provided with annularsockets I, arranged at equal distances apart on its surface. 1preferably make this spring-clamp as shown in Fig. 6 in the drawings,where it is shown as a split ring provided with an inclined outersurface conforming to the equally-inclined interior bore of the driver.driver is threaded, asseen at H, so that the threads h on the exteriorof the split ring may fit thereon. When the ring is placed in positionand screwed up, as the interior diameter of the interior bore of thedriver grows slightly less the split ringwill be compressed against thedriving-shaft and prevent the driver from revolving thereon. Looselymounted on said shaft F is a sleeve J, provided with a disk K and a camL. This sleeve is prevented from rotating by means of the clamp-supportM, having a foot N, adapted to fit in thepuppethead N in acarding-machine. Adapted to rotate on said cam is an externally-toothedgear 0, provided withspurs P. These spurs are adapted to fit in theholes I in the driv- The interior bore of the ing-disk. Attached to theshaft Q and held against rotation thereon by means of nut R and splitbushing S is an internally-toothed gear T. The teeth in said internalgear are adapted to mesh with teeth on the periphery of the spur-gear O.\Vhen power is applied to the pulley connected by its shaft with theshell, motion is imparted to the hollow shaft E and thence to the drivendisk. Thence for the reason that the spurs on the externallytoothed gearwill engage the holes in the driving-disk motion is imparted to thisdisk, and as these teeth mesh with the teeth in the internallytootheddisk they impart motion thereto in proportion of seven to eight.

Previously it has been difficult to properly adjust the card-grindingdevice on the carding-machine so that the grinder will travel across thecard and reverse and travel back again without, at the moment ofreversing, grinding some of the teeth on the cards too much, as ateither extremity of the card. In order to obviate this and to have afiner and nicer adjustment,I use a sliding spring-clamp, as beforedescribed. By means of this clamp sliding on the shaft the card-grindingdevice can be easily and nicely adjusted, without removing the machinefrom its supports, by simply sliding the whole shaft through the clamp,the clamp being loosened, so that the shaft can be moved in such manneras to obviate all difficulty as to the distance that has to be traversedby the grinding-wheel. The supports as previously constructed haveconsisted of a hollow sleeve having a foot or downwardly-extending lug,but not adapted to be clamped upon the shaft. adjust said device, it hasbeen necessary to take the whole machine out of its supports, remove thesleeve, and either reverse the same, for its longitudinal distance oneach side of the downwardly-projeeting lug is not the same, or, as isoftentimes the case, it is necessary to cut off portions of the shell,so that the grinder can be adjusted properly. This entails a greatamount of unnecessary labor and waste of time, which is entirelyobviated in my improved device. In order to hold the internally-toothedgear from revolution on the driven shaft and,further, to provide an easyand sure method of locking the same on its shaft, I use an improved formof bushing, as shown in Fig. '7 in the drawings,

pressing the split bushing, and consequently binding the said gear onits shaft. has for its function simply the supporting of Sleeve J theshafts, both driving and driven, and its disk, with the cam L on itssurface, imparts an eccentric motion to the externally-toothed In orderto gear. Said sleeve does not revolve, and con sequently the disk andits cam are held against rotation, the eccentric motion of theexternally-toothed spur-gear 0 being brought about by it being caused torevolve on the cam L, made rigid with the disk K and sleeve J.

The advantages of myimproved device are that it provides a simple,effective, and cheap means for imparting a differential motion and,furthermore, affords an effective and ready means for adjustment.

Having thus described my invention and its use, I claim- 1. In a machinefor imparting differential rotary motion,in combination,a hollow sleeve,a plate on the end thereof, an eccentric on said plate, said sleevebeing held against rotation by a sliding spring-clamp, a spur-gearadapted to rotate on said eccentric and means for imparting a rotarymotion to said spurgear, substantially as and for the purposes setforth.

2. In a machine for imparting differential rotary motion,incombination,a driving-shaft, a disk rigidly mounted on one end thereof,said disk being provided with annularsockets, a spur-gear provided Withoutwardly-extending lugs adapted to fit in said sockets, aninternally-toothed gear adapted to mesh with the spur-gear, means forholding said inter nally-toothed gear, rigidly on its shaft, a cam onwhich said spur-gear revolves and means for holding said cam againstrevolution, sub stantially as and for the purposes set forth.

3. In a machine for transferring differential rotary motion incombination, a driving-shaft having a disk with annular sockets on itssurface rigidly attached to one extremity, an externally-threaded gearmounted on an eccentric and provided with lugs on its surface, said lugsadapted to fit in the sockets in the disk and means for holding saideccentric stationary, substantially as and for the purposes set forth.

4. In a machine for imparting differential rotary motion, an annulardriving-shaft, a driver rigidly attached thereto, said driverbeingprovided with annular sockets in its face, an externally-toothed gearwith spurs on its surface, said spurs adapted to engage theannularsockets in the driver, a driven shaft, an internally-toothedshell mounted thereon, the teeth on the gear adapted to mesh with theteeth on said shell and means for holding said driver and shell rigid ontheir respective shafts, substantially as and for the purposes setforth.

5. In a machine for transferring differential rotary motion, an annulardriving-shaft, a driver rigidly attached thereto, said driver be ingprovided with annular sockets in its face, an externally-toothed gear,with spurs on its surface, said spurs adapted to engage the annularsockets in the driver, a driven shaft, an internally-toothed shellmounted thereon, the teeth on the gear adapted to mesh with the IEOteeth on said shell and a split bushing proin presence of two wit-nessesthis 6th day of videdwith an annular lip adapted to fitclosely March, A.D. 1899. to said shell, an internally-threaded set-nut adapted to be setup against said shell and 5 compress said bushing, substantially as andWitnesses:

for the purposes set forth. LEWIS P. SHERMAN, In testimony whereof IaffiX my signature, ERWIN S. DROWN.

DANIEL H. B. HOOPER.

